I have a 1/2" star fitting connected to a threaded elbow. The lines connect to that.
The flow will change depending on how the sap is running. I've seen it gurgle out and I've also seen it be almost a steady stream. It's at another land owners place so I'm not always there and I happen to be there picking up sap when it was flowing decently so I decided to shoot the video...mainly because I hadn't seen one and I wanted to share.